Overhead boom arrangement for a packaging machine

Details Overhead boom arrangement for a packaging machine Overhead boom arrangement for a packaging machine

1999-07-23

2001-09-04

Vo, Peter (Department: 3721)

Package making

Multiple bottle or can carrier type package

Wrap

C053S048100, C053S048700, C053S209000, C198S626600, C198S836200

Reexamination Certificate

active

06282864

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an overhead boom arrangement for use in a packaging machine, particularly but not exclusively packaging machines for forming cartons around a plurality of products such as bottles or cans.
SUMMARY OF THE INVENTION
According to the present arrangement there is provided an overhead boom arrangement for use in a packaging machine comprising a support structure, a plurality of endless belts carried thereon, each endless belt being driven around a set of rollers mounted on the support structure and having an active portion of its path during which in use the belt engages blanks or products as they move through the packaging machine, at least one of the belts being height adjustable such that said active portion of said one belt path is movable upwards and downwards relative to the support structure and the active portions are parallel to each other and in use run at the same speed equal to that of the product speed of the packaging machine.
In some preferred arrangements three belts are provided, the central belt being height adjustable relative to the support structure of the boom arrangement and the outer two belts being fixed relative to the support structure.
In other preferred arrangements five belts are provided, the central and extreme side belts being fixed relative to the support structure and the two belts between the central belt and the respective extreme side belts being height adjustable relative to the support structure.
Preferably, in use, the complete overhead boom arrangement is movable vertically relative to the horizontal plain of the packaging machine. Conveniently the belts are elastic in nature and also the belts are circular in cross-section.
A preferred feature of the present invention is that each belt is supported by rollers along said active portion of the path of the belt. The rollers for the or each movable belt are carried by a bracket which is vertically movable relative to the support structure of the boom arrangement.
In certain embodiments said movement of the or each bracket is effected by a hand operated wheel attached to a sleeve carrying a threaded collar and mounted for rotation only relative to the support structure and a threaded shaft which cooperates with the threaded collar and which carries the bracket. With certain arrangements the threaded shaft is capable only of movement along its lengthwise axis.
One further preferred feature is that the rollers supporting each endless belt along said active portions are provided with resilient suspension means in a direction perpendicular to the active portions. Conveniently the rollers are mounted on rubber mountings.


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